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Next Generation Redshift Surveys and the Origin of Cosmic Acceleration
Viviana Acquaviva, Amir Hajian, David N. Spergel +1
Cosmologists are exploring two possible sets of explanations for the remarkable observation of cosmic acceleration: dark energy fills space or general relativity fails on cosmologi…
Observational signatures of Jordan-Brans-Dicke theories of gravity
Viviana Acquaviva, Licia Verde
We analyze the Jordan-Brans-Dicke model (JBD) of gravity, where deviations from General Relativity (GR) are described by a scalar field non-minimally coupled to gravity. The theory…
Dark energy records in lensed cosmic microwave background
Viviana Acquaviva, Carlo Baccigalupi
We consider the weak lensing effect induced by linear cosmological perturbations on the cosmic microwave background (CMB) polarization anisotropies. We find that the amplitude of t…
Structure formation constraints on the Jordan-Brans-Dicke theory
Viviana Acquaviva, Carlo Baccigalupi, Samuel M. Leach +2
We use cosmic microwave background data from WMAP, ACBAR, VSA and CBI, and galaxy power spectrum data from 2dF, to constrain flat cosmologies based on the Jordan-Brans-Dicke theory…
Weak lensing and gravity theories
Viviana Acquaviva, Carlo Baccigalupi, Francesca Perrotta
We present the theory of weak gravitational lensing in cosmologies with generalized gravity, described in the Lagrangian by a generic function depending on the Ricci scalar and a n…
Weak lensing in generalized gravity theories
Viviana Acquaviva, Carlo Baccigalupi, Francesca Perrotta
We extend the theory of weak gravitational lensing to cosmologies with generalized gravity, described in the Lagrangian by a generic function depending on the Ricci scalar and a no…